SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
86
3.2
“
A1
” Indoor Unit: P.C.B. Defect
Remote
Controller
Display
A1
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Check data from E²PROM.
Malfunction
Decision
Conditions
When data could not be correctly received from the E²PROM
E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power
supply is turned off.
Supposed
Causes
Defect of indoor unit P.C.B.
Troubleshooting
T
u
rn po
w
er s
u
pply OFF, then
po
w
er O
N
again.
Does
the system ret
u
rn
to normal?
YES
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts co
u
ld
b
e damaged.
External factor other than
malf
u
nction (for example,
noise etc.).
Replace the indoor
u
nit
P.C.B.
N
O
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